2 latest waterproofing techniques

Modern waterproofing methods have changed construction industry over the years. Huge rise in urbanization and need of effective waterproofing techniques have replaced the old conventional waterproofing processes with new updated and more effective waterproofing solutions.

Here, we will discuss adoption of new waterproofing systems, their usages, advantages and precautions to be taken for best possible results. In most of the waterproofing problems, a single waterproofing technique or chemical is not enough. Combinations of chemicals and techniques are required to make a structure completely waterproof. Basically there are two key waterproofing methods that can solve any waterproofing problems.

Flexible membrane waterproofing techniques (liquid-applied)

Liquid applied flexible membrane based waterproofing is most popular and used waterproofing system now a days. Membrane based waterproofing can be effective on horizontal or vertical surfaces and for positive or negative water pressure. But different grade and strength of the membrane should be used as desired for problem and water pressure. We can use membrane based waterproofing techniques for Terrace waterproofing, Terrace Gardens, Basement waterproofing, Water tanks, and in sunken areas such as bathrooms or kitchens. Though, protective layers must be different for different scenarios for examples, Terrace gardens treatments need thick layer of protective layer compare to terrace waterproofing. We can check flexibility and elongations to measure the strength of chemicals. These two components are required since buildings face expansions and contractions due to temperature variations. Another key point to check is whether membrane is vapor permeable or not. Else, membrane would stop the breathing of concrete which might hamper any structure.

A typical waterproofing process for flexible membrane systems is as follows:

Filling all cracks, grooves etc. and removing all honey combings with cement modifiers or strengtheners

Application of two coats of liquid applied flexible membrane on the surface. Use fiber mesh if required.

Provide protective layer of plaster or concrete depending on situations and problems.

Advantages of flexible membrane waterproofing systems

Best method to provide waterproofing solutions

Do not hamper breathability of structures

Can be used for any kind waterproofing problem

Availability of various grads and types

Easy application

Silicone based waterproofing techniques

To protect the vertical surfaces from rain water, we can use silicone based waterproofing systems. Concrete has tiny holes and various capillaries that have been developed during concrete formations. These holes and capillaries make concrete porous and hence water permeable.

Silicone based crystalline waterproofing chemicals create a barrier and prevent surface form the water. However, such chemicals are not good for standing water since crystals of silicone break if continues water pressure is applied.

A typical waterproofing process for flexible membrane systems is as follows:

While the first part of this two-part series examines conventional waterproofing systems and offers tips to use them for optimum effect, the second part will discuss modern waterproofing techniques. H. M A Waheed | Mumbai July 11, 2014 Last Updated at …